/*
 * Copyright 2007 Brian Watkins
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package bw.search;

import java.util.*;

public class SearchManager
{
    private static SearchManager _instance = null;
    private static Object _lock = new Object();

    private Hashtable _queries = new Hashtable();
    private SearchQuery _default = null;

    public static SearchManager getInstance()
    {
        if ( _instance == null )
        {
            synchronized ( _lock )
            {
                if ( _instance == null ) 
                {
                    _instance = new SearchManager();
                }
            }
        }

        return _instance;
    }

    private SearchManager ()
    {
        //nothing
    }

    public void addSearchQuery ( String code, SearchQuery query )
    {
        _queries.put( code, query );
    }

    public void setDefaultQuery ( SearchQuery query )
    {
        _default = query;
    }

    public SearchQuery getDefaultQuery ()
    {
        return _default;
    }

    public SearchQuery getSearchQuery ( String code )
    {
        SearchQuery query = (SearchQuery) _queries.get( code );

        return ( query == null ? _default : query );
    }
}